A 37-year-old man arrested Wednesday in Washington state as part of a probe of ricin-laced letters threatened in one such letter to injure and kill a federal judge, a grand jury indictment alleges.

FBI agents arrested Matthew Ryan Buquet on Wednesday ...

Counterterrorism drone strikes have killed four Americans overseas since 2009, the U.S. government acknowledged for the first time on Wednesday, one day before President Barack Obama delivers a major speech on related policy.

In a letter to Senate Jud...

The tornado that struck the Moore, Okla., area Monday afternoon left an almost 2-mile wide path of destruction, flattening homes and businesses and taking at least 24 lives.

We can't settle iPhone vs. Android or "Star Wars" vs. "Star Trek" for you. But another long-running geek debate was put to rest Tuesday night.

Those short, animated loops that have captivated the Web for decades? They're pronounced like a brand of pea...